Atomic structure

Question 1

Element

Answer 1

• a substance containing only one type of atom
• all the atoms in an element have the same proton number

Question 2

Atom

Answer 2

the smallest part of an element that can take part in a chemical change

Question 3

Proton

Answer 3

positively charged particle in the nucleus of an atom

Question 4

Neutron

Answer 4

uncharged particle in the nucleus of an atom

Question 5

Electron

Answer 5

negatively charged particle found in orbitals outside the nucleus of an atom ; negligible mass

Question 6

Energy levels

Answer 6

the specific distances from the nucleus corresponding to the energy of the electrons

• electrons in energy levels further from the nucleus have more energy than those closer to the nucleus